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Finding the Fourth Proportional to 461,489.68, 636,609 and 318,320.56

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Solution

The fourth proportional to 461,489.68, 636,609 and 318,320.56 is: 439,112.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,489.68 : 636,609 = 318,320.56 : x
  2. Step 2: Convert to fraction form
    461,489.68/636,609 = 318,320.56/x
  3. Step 3: Cross multiply
    461,489.68x = 636,609 × 318,320.56
  4. Step 4: Simplify right side
    461,489.68x = 202,645,733,381.04
  5. Step 5: Solve for x
    x = 202,645,733,381.04/461,489.68
  6. Step 6: Final answer
    x = 439,112.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.